<!--$Id: db_stat.so,v 10.45 2004/07/14 15:41:04 bostic Exp $-->
<!--Copyright 1997-2004 by Sleepycat Software, Inc.-->
<!--All rights reserved.-->
<!--See the file LICENSE for redistribution information.-->
<html>
<head>
<title>Berkeley DB: db_stat</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
</head>
<body bgcolor=white>
<table width="100%"><tr valign=top>
<td>
<h3>db_stat</h3>
</td>
</tr></table>
<hr size=1 noshade>
<tt>
<h3><pre>db_stat <b>-d</b> <b>file</b> [<b>-fN</b>] [<b>-h home</b>] [<b>-P password</b>] [<b>-s database</b>]
db_stat [<b>-cEelmNrtVZ</b>] [<b>-C Aclop</b>] [<b>-h home</b>] [<b>-L A</b>] [<b>-M A</b>] [<b>-R A</b>] [<b>-P password</b>]</pre></h3>
<h3>Description</h3>
<a name="2"><!--meow--></a>
<p>The db_stat utility displays statistics for Berkeley DB environments.</p>
<p>The options are as follows:</p>
<dl compact>
<dt><b>-C</b><dd>Display internal information about the locking subsystem.  (The output
from this option is often both voluminous and meaningless, and is
intended only for debugging.)
<dl compact>
<dt>A<dd>Display all information.
<dt>c<dd>Display lock conflict matrix.
<dt>l<dd>Display lockers within hash chains.
<dt>o<dd>Display lock objects within hash chains.
<dt>p<dd>Display locking subsystem parameters.
</dl>
<dt><b>-c</b><dd>Display locking subsystem statistics, as described in <a href="../api_c/lock_stat.html">DB_ENV-&gt;lock_stat</a>.
<dt><b>-d</b><dd>Display database statistics for the specified file, as described in
<a href="../api_c/db_stat.html">DB-&gt;stat</a>.
<p>If the database contains multiple databases and the <b>-s</b> flag is
not specified, the statistics are for the internal database that describes
the other databases the file contains, and not for the file as a whole.</p>
<dt><b>-E</b><dd>Display internal information about the database environment, including
all configured subsystems of the database environment.  (The
output from this option is often both voluminous and meaningless, and
is intended only for debugging.)
<dt><b>-e</b><dd>Display information about the database environment, including
all configured subsystems of the database environment.
<dt><b>-f</b><dd>Display only those database statistics that can be
acquired without traversing the database.
<dt><b>-h</b><dd>Specify a home directory for the database environment; by
default, the current working directory is used.
<dt><b>-l</b><dd>Display logging subsystem statistics, as described in <a href="../api_c/log_stat.html">DB_ENV-&gt;log_stat</a>.
<dt><b>-M</b><dd>Display internal information about the cache.  (The output from this
option is often both voluminous and meaningless, and is intended only
for debugging.)
<dl compact>
<dt>A<dd>Display all information.
<dt>h<dd>Display buffers within hash chains.
</dl>
<dt><b>-m</b><dd>Display cache statistics, as described in <a href="../api_c/memp_stat.html">DB_ENV-&gt;memp_stat</a>.
<dt><b>-N</b><dd>Do not acquire shared region mutexes while running.  Other problems,
such as potentially fatal errors in Berkeley DB, will be ignored as well.
This option is intended only for debugging errors, and should not be
used under any other circumstances.
<dt><b>-P</b><dd>Specify an environment password.  Although Berkeley DB utilities overwrite
password strings as soon as possible, be aware there may be a window of
vulnerability on systems where unprivileged users can see command-line
arguments or where utilities are not able to overwrite the memory
containing the command-line arguments.
<dt><b>-R</b><dd>Display internal information about the replication subsystem.  (The
output from this option is often both voluminous and meaningless, and
is intended only for debugging.)
<dl compact>
<dt>A<dd>Display all information.
</dl>
<dt><b>-r</b><dd>Display replication statistics, as described in <a href="../api_c/rep_stat.html">DB_ENV-&gt;rep_stat</a>.
<dt><b>-s</b><dd>Display statistics for the specified database contained in the file
specified with the <b>-d</b> flag.
<dt><b>-t</b><dd>Display transaction subsystem statistics, as described in <a href="../api_c/txn_stat.html">DB_ENV-&gt;txn_stat</a>.
<dt><b>-V</b><dd>Write the library version number to the standard output, and exit.
<dt><b>-Z</b><dd>Reset the statistics after reporting them; valid only with the <b>-C</b>,
<b>-c</b>, <b>-E</b>, <b>-e</b>, <b>-L</b>, <b>-l</b>,
<b>-M</b>, <b>-m</b>, <b>-R</b>, <b>-r</b>, and <b>-t</b>
options.
</dl>
<p>Values normally displayed in quantities of bytes are displayed as a
combination of gigabytes (GB), megabytes (MB), kilobytes (KB), and bytes
(B).  Otherwise, values smaller than 10 million are displayed without
any special notation, and values larger than 10 million are displayed
as a number followed by "M".</p>
<p>The db_stat utility may be used with a Berkeley DB environment (as described for the
<b>-h</b> option, the environment variable <b>DB_HOME</b>, or
because the utility was run in a directory containing a Berkeley DB
environment).  In order to avoid environment corruption when using a
Berkeley DB environment, db_stat should always be given the chance to
detach from the environment and exit gracefully.  To cause db_stat
to release all environment resources and exit cleanly, send it an
interrupt signal (SIGINT).</p>
<p>The db_stat utility exits 0 on success, and &gt;0 if an error occurs.</p>
<h3>Environment Variables</h3>
<dl compact>
<dt>DB_HOME<dd>If the <b>-h</b> option is not specified and the environment variable
DB_HOME is set, it is used as the path of the database home, as described
in <a href="../api_c/env_open.html">DB_ENV-&gt;open</a>.
</dl>
</tt>
<p><font size=1><a href="../sleepycat/legal.html">Copyright (c) 1996-2004</a> <a href="http://www.sleepycat.com">Sleepycat Software, Inc.</a> - All rights reserved.</font>
</body>
</html>
